https://www.commondreams.org/news/2020/03/23/nigeria-reports-chloroquine-overdoses-after-trump-without-evidence-touted-drug

"The Lagos State Health Ministry issued a brief statement saying there was no 'hard evidence that chloroquine is effective in prevention or management of coronavirus infection,'" CNN noted. "Chloroquine is used to treat malaria, lupus, and rheumatoid arthritis."

Despite warnings from health experts that chloroquine has not been tested for treating COVID-19, Trump falsely claimed during a press briefing Sunday that the evidence for chloroquine's effectiveness in treating the coronavirus is "very strong."

"Why should we be testing it in a test tube for a year and a half when we have thousands of people that are very sick, and we can use it on those people and maybe make them better?" the president asked.